AHHHHHHHHHHHHH
Damn Kindle. Nothing is consistant. I been fighting with trying to get it sort by series in the author tag. If the series and number is added as additional author afterwards it won't sort right. So now I put the series and number as first author, and that works. Seperated it to only work on save to disk so it won't do it automatically for everything I send to the Kindle.
from: mobi
to: save to disk
source: {series_index:0>2s}, {series} & {author_sort}
destination: authors
So only when I save it to disk first before pushing it to the kindle will it mess with the author.
Amazon really needs to make sorting books easier